AQUACOMPLEXES OF RARE EARTH ELEMENTS (Ce3+, Eu3+, Gd3+ and Yb3+) WITH closo-DODECABORATE ANION: SYNTHESIS, STRUCTURE, PROPERTIES

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Abstract

Aquacomplexes [M(H2O)8]2[B12H12]3·15H2O (M = Eu3+, Gd3+, Yb3+) and [Ce(H2O)9]2[B12H12]3·15H2O stabilized by closo-dodecaborate anion have been synthesized by neutralization of (H3O)2[B12H12] solution with rare earth element (REE) oxides M2O3 (M = Eu3+, Gd3+, Yb3+) and CeO2 and characterized. The structures of [Eu(H2O)8]2[B12H12]3·15H2O and [Ce(H2O)9]2[B12H12]3·15H2O have been determined by X-ray diffraction analysis. It was found that the reaction in the CeO2/(H3O)2[B12H12] system is accompanied by the redox transformation Ce4+ → Ce3+, while for the M2O3 (M = Eu3+, Gd3+, Yb3+)/(H3O)2[B12H12] systems, stabilization of the oxidation state of the corresponding REE has been observed. The luminescent properties of [Ce(H2O)9]2[B12H12]3·15H2O have been studied. It was shown that this compound emits in the near ultraviolet region with an emission maximum at 370 nm.

About the authors

I. I Myshletsov

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Email: korolencko0110@yandex.ru
Moscow, Russia

E. A Malinina

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

A. S Kubasov

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

G. A Buzanov

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

L. V Goeva

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

S. E Nikiforova

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

A. G Son

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

N. T Kuznetsov

Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Moscow, Russia

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